The Cape says "Once you understand the science of the fire it then becomes an art of the burn!"
Incredibly prolific statement if I may add, lots of science, like one side of the pile was not burning after putting in a new load with a low spot in the front of the side that was not burning, put a thin layer of coal over the low spot and blam, the side that was not previously burning started to wick those blues, think it was that the low spot was a easier path for the air to travel thru which kinda staved the other non burning area of air. Once that low spot was covered, there likely was a equal delta p thru the bed, so everything ignited, thats the SCIENCE that Cape noted!!!
A nice even pile left to right mounded uniformly really gives a nice uniform blue flame, also, FLOSS, FLOSS. I do this after putting in the new coal with ash door open to reignite the new coal, within those 1-3 minutes of ash door being open the darker spots are flossed to starting seeing the red. My flossing wire is not that long (wire bent 2 1/4" 90 degrees at end) This stops thru bed ash accumulations, to me this is my most important thing I've learned in the past weeks. Hope my opinions help,
Devilllll taught me this stuff. He's my Techie Mentor for Newbies, is there a category for that in the coaler of the year?